//knapsack
#include<bits/stdc++.h>
using namespace std;
struct item{
int weight,price;
double PUprice;
}arr[10004];
bool cmp(item a, item b){
if(a.PUprice>=b.PUprice)return true;
else return false;
}
int main(){
int KScapacity,items;
double profit=0.0;
scanf("%d %d",&KScapacity,&items);
for(int i=0;i<items;i++){
scanf("%d",&arr[i].weight);
}
for(int i=0;i<items;i++){
scanf("%d",&arr[i].price);
arr[i].PUprice=(arr[i].price*1.0)/arr[i].weight;
}
sort(arr,arr+items,cmp);
for(int i=0;i<items;i++){
if(arr[i].weight>=KScapacity){
profit=profit+arr[i].PUprice*KScapacity;
arr[i].weight=arr[i].weight-KScapacity;
KScapacity=0;
break;
}
else{
KScapacity=KScapacity-arr[i].weight;
profit=profit+arr[i].price;
}
}
printf("\nprofit = %.5lf\n",profit);
return 0;
}
Replies to Fractional Knapsack
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